鈮、鈦添加對高強度冷軋鋼片機械性質之影響

Effect of Nb and Ti on the Mechanical Properties of High-Strength Cold-Rolled Sheet Steels

陳煌湶(Huang-Chuan Chen) ； 張六文(Liuwen Chang) ； 黃議興(Yie-Shing Hwang)

《鑛冶：中國鑛冶工程學會會刊》 40卷4期 (1996/12) Pp. 88-96

https://doi.org/10.30069/MM.199612_40(4).0008

摘要

本研究以0.1%C-0.35%Si-1.1%Mn為基礎成份，添加不同含量之Nb及Ti，探討合金成份及製程對冷軋鋼片機械性質的影響，以開發高強度冷軋鋼片。Nb、Ti的添加均有阻擋再結晶反應之現象，因而可擴大回復反應之溫度範圍，但以單獨添加0.08%Ti之效果最佳。提高冷軋率卻會加速再結晶反應。Nb阻擋再結晶晶粒成長之效果比阻擋再結晶成核之效果大，有利於雙相處理鋼之生產。於上述基本鋼材中，單獨添加0.08%Ti，採取較低之冷軌率，並進行回復退火處理，可得到TS＞ 85kg/mm^2，El＞ 6%之高強度冷軋鋼片。上述鋼材若在740℃退火，可得到TS＞ 75kg/mm^2、EL＞17%、組織為回復肥粒鐵＋麻田散鐵或變韌鐵之高強度冷軋鋼片。

關鍵字

高強度冷軋鋼片 ； 退火 ； 回復 ； 再結晶

並列摘要

Effects of Nb, Ti addition and processing parameters on mechanical properties of high-strength cold-rolled sheet steels were investigated using 0.1%C-0.35%Si-1.1%Mn steels. Nb and Ti addition increases recrystallization temperatures of the steels. In this way, the addition of Ti and Nb expanded the temperature range of recovery, especially for steel containing 0.08%Ti. High reduction ratio (70%) in cold rolling accelerates recrystallization reaction, Nb inhibits grain growth rather than nucleation during recrystallization. Therefore, Nb addition in steel is beneficial to the production of dual-phase steel. The addition of 0.08%Ti to 0.1%C-0.35%Si-1.1%Mn steel has been helf to produced high-strength cold- rolled steel with TS ＞ 85kg/mm^2 and EI＞ 6%. Furthermore, high-strength cold-rolled steel, having TS ＞ 75kg/mm^2 and El ＞ 17%, can also be produced using the same steel annealed at 740℃. The resultant microstructure of the later steel contains recovered ferrite, martensite and/or bainite.

並列關鍵字

High-strength cold- rolled steel ； Annealing ； Recovery ； Recrystallization